Road scraper



l D nl. .HRM `HD HP. Fm USV.. Dwwa Lm@ ...m oo.

vooI

@www

y Patented Dec. 18, 192.8.- l'

:UNITED :STATES u ifr|iI1o1nAsln DUFFIELD, or oni-ENT, vrnsrrineron. `iy

ROAD yscnnrnn.

Application filed May25,

presentinvention relates to yimprovements in roadscrapers or excavators ofthe dragftype for general grading, leveling,n

j smoothing and distributingY the material on "the road surface. Due'to the simplicity of construction and minimumnumber of' parts employed in the implement strong, rugged and durable scraper Iis `provided that may readily be repaired and in whichparts may lo withv facility `bereplaced when required.y Theimplement involves essentially "the'use' ofl a ,longitudinally disposed drag bar or beam anda transversely disposed scraper blade, with means for angularly adjusting ina horizontalplane, and with means for tilting the scraper blade. y,The scrape-r is thus adjustable Afor the purpose of laterj ally distributing the materialof the road zo'surfaceiand is 'adapted to' be tiltedzfor the purpose of :performing [thefunctions of'a smoother so thatjthe surplus or excess material may be smootheddown or deposited in the low places in the roadway ranged according to the best mode I have -thus far devised for the practical applica-r tion ofthe principles of my invention.

, Figure l is a side `view of an implement embodying my invention, the scraperblade being shown in section. Y

AF'gure 2 is a top planview of the implement with partsy broken `away for con venience of illustration Figure 3 is a frontview of the drag beam showing the draft head, for hitchingthe power.' f j Figure 4 is a detail side view showing the locking lever for the adjusting chain of the scraper blade.

Figure 5 is a beam.

`rear end view of the drag `In carrying out my invention Iutilize a longitudinally disposed drag beam l which is preferably made up of angle iron shapes, strong and rugged and of sufficient weight for the purpose.v .The'driver occupies a seat 2 that is supported on thefdrag beam, at ythe c 5U `rear end of the implement, and horse-power or an automotive tractor may beutilized to .the scraper bla'de-withjrelation to the beam The invention consists in certainl novel- 1527; serial No. 194,084.

pull= the implement along theroad orl over the surface to be graded.fr At the front of- PFATFENT .OFFICE the`- drag "beam is providedY ai hitching lor coupling headB whichis flanged and rigidly attached to the beam andv rises vertically therefrom -to a suitable height. VAtitsfupper end the coupling head turns forwardly and its forked rend is perforated-Ito receive afking bolt or coupling pin l to pass througha usual clevis orothe'r attaching device onthe f draft-device for theimplement.'y At the rea-r of the'beam, a shoe orskidisprovidedp whichV projects below vthe lower. edge 'of the beamand-is designed to prevent lateral skid! `ding of the beam as well astokeep .the im# f" plement moving along the desireddraft line.v

The. scraper blade 6 is normally'disposedf transversely ofthe drag beam l 'at the front thereof `and at `its center is located. under'` 'the coupling head, or its forwardly turned" Aupper end. The. bladeis preferably a coni.,-

cavo-'ccnvex Jmetal-v plate Y ofl convenient* lengthand height and normally standsgink `vertical position, perpendicular tothe road surface. yAs indicated' inv Figure l2 the blade iscapable of being turned to coincide with'v j the dotted lines, and in these angular po` sitions may distribute the material Aon `the road` surface laterally to lthe "right or left. The blade is also adaptedto be tilted by swinging its upper edge lto the front or to `the rear thus presenting thelower edge 'of *i the blade in different positions foraccomplishing vvarious working conditions. v

At thelongitudinal center of theblade, neargits .lower edgeand at its rear is `providedra coupling head 7 rigidly attached yto 'the beam-and adapted to receive a coupling `bolt 8 which co-acts with a clevis or yoke 9 which is pivoted at 9.y to the draw head 3 of the longitudinal beam. By'this coupling ar-v j rangement the blade may 'be'fswung'hori-v zontally with the bolt 8 as a pivot, or the blade may be tilted on the pivot' SX of the dicat-ed adjustments.

A retaining Vchain is utilized in connection with the scraper blade for holding it in i l y laterally adjusted position and this cha-m18 at the rear side of the 'of thefangle of the chain issecured on the draw head, for accomplishing the above in- D ,Y 5

drag beam 1. For this purpose I use a chain locking-lever 14 which extends longitudinally of the drag beam and is pivoted thereon at 15, at the front end of the lever, or the lever nearer to the scraper blade. As best seen in Figure 4 the lever is fashioned with a key-hole slot 16 which is adapted to permit passage therethrough of the links of the chain, and to lock the chain in adjusted` position. The rear larger end of the slotV permits the links to be pulled transversely through the lever, and freely, but the forward, narrow end of the slot is of proper size as to permit insertion and retention therein of one of the horizontally disposed links oi the chain.` With one horizontal link ofthe chain in this narrow slot, the two `adjoining links, `in vertical position, prevent transverse passage ot the ,chain through the lever, and when the lever `is turned back to `.position vof Figure 1 the chain is locked in its desired adiusted position, v e Y For locking the lever in position l use a '1J-shaped `slide or keeper 1'( thatmay be slid and off the free end of `the lever for locking or unlocking it, and when the lever has been unlocked it may be turned up to dotted position in Figure l to perniit `ready manipulation o the chain in adj usting it.

Means for tilting the scraper blade` is readily accessible -for the driver sittingl in the seat 2., who `may use the llever 18 that is pivoted on the drag' beam at 19 and provided with la usual type of `pavvl 20 and rack" segment 21. i Inasmuoh as the scraper blade is frequently ad'usted orY tilted during the operi `conneetion of the .rod at the upper edge of the blade provides for an eicient Working i leverage on thefblade and b manipulating the lever 18 the blade may e` tilted as desired on the pivot 9 as heretofore described.

llavin thus `fully described my invention,

what I c aim as new and desire to secure by.

Letters Patent is: A 1. The combination with a *drag1V beam having a rear shoe and a. front draw head,

Volf a transversely disposed scraper blade having a coupling head at its rearcenter,

va clevis pivoted to the coupling head and to the draw head whereby .the blade may be `swung horizontally or tilted vertically means for holding the blade in adjusted .horizontal position, and means 'for tilting and retaining the blade in tilted position. e. 2. The combination with a `drag beam of a scraper blade pivoted theretoand adapted i to swing horizontally, a. .single retaining chain having end `near the ends ol" the blade, and a .locking lever having a key-hole slot A:pivoted on the Vdra beam, said chai-n being passed through an locleed inlsaid lever as describdmx n testimon whereof` f n m y i y., mos. LDU sigma. 

